中文摘要：

通过共沉淀法制备一系列含有不同阳离子的层状双金属氢氧化物（m^2＋-m^3＋-LDHs,m^2＋为Zn2＋或Mg^2＋,m^3＋为Fe^3＋或Al^3＋）,采用X射线衍射仪（XRD）、BET、X射线荧光光谱仪（XRF）手段对材料进行了表征,研究了不同阳离子比例、种类和初始pH对LDHs吸附诺氟沙星（NOR）的影响。结果表明,n（m^2＋）：n（m^3＋）=2：1时的LDHs材料对NOR的吸附量最大,且Mg-Al-LDHs的吸附效果最好;LDHs对诺氟沙星的吸附过程符合准2级动力学,吸附过程符合langmiur吸附类型,pH在3-10内吸附量稳定。

英文摘要：

M^2＋-M^3＋-layered double hydroxides（M^2＋-M^3＋-LDHs） containing M^2＋：Zn^2＋/Mg^2＋; m^3＋and Fe^3＋/Al^3＋were prepared by the co-precipitation method.The solids were characterized by X-ray diffraction（XRD）,Brunner-Emmet-Teller（BET） and X-ray fluorescence analysis（XRF）.The effects of LDHs with different M^2＋/M^3＋molar ratios,type and the initial solution pH on norfloxacin（NOR） adsorption were investigated.The results showed that Mg-Al-LDHs with n（M^2＋）：n（M^3＋） of 2：1 exhibited the best performance for NOR adsorption.Two kinetic models were used to fit the experimental data,indicating that the pseudo-second-order kinetics model could better describe the adsorption process.Langmuir model fitted well with the adsorption equilibrium data.The adsorption amount of NOR was stable within initial pH ranging from 3-10.